PVC/超细SiO_2复合材料的制备与加工对其性能的影响

Preparation and process of PVC/superthin-SiO_2 compound material related to its properties

用沉淀法制备了超细二氧化硅粉体,探讨了纳米二氧化硅溶胶的最佳沉淀率以及不同偶联剂用量、不同二氧化硅添加量对材料力学性能的影响。通过实验发现,用BS-12不能完全沉淀出液相中的二氧化硅,最佳沉淀率为92%。将沉淀出的二氧化硅通过共沸蒸馏和KH-560表面改性后再与PVC共混,发现PVC的拉伸强度和冲击强度可分别提高117%和19%,其他力学性能也得到相应改善。

Superthin-SiO2 powder were prepared by deposition. The influence of different contents KH-560 and SiO2 on the mechanical properties of PVC were studied. The results show that the surfacial handled superthin SiO2 can efficiently improve the mechanical properties of PVC.